Resetting and interlock mechanism for liquid dispensing apparatus



Jan. 20, 1953 H. N. BLISS ET AL 2,626,082

RESETTING AND INTEIRLOGK MECHANISM 4 FOR LIQUID DISPENSING APPARATUSFiled July 11, 1950 4 Sheets-Sheet 1 47/ a4 (95 ea Q-Ell 3mm HA2 VEY N51115:; OTTO MLD, JR.

Jan. 20, 1953 H. N. BLISS ETAL RESETTING AND INTERLOCK MECHANISM FORLIQUID DISPENSING APPARATUS 4 Sheets-Sheet 5 Filed July 11, 1950 gum/MowHARVEY N BLISS OTTO VWZ/LD, JR

H. N. BLISS ET AL RESETTING AND INTERLOCK MECHANISM FOR LIQUIDDISPENSING APPARATUS Jan. 20, 1953 4 Sheets-Sheet 4 Filed July 11, 1.950

HARVEYNBLJSS OTTO MLD, JR.

ATTORNEYS Patented Jan. 20, 1953 UNITED STATES QFFICE RESETTING ANDINTERLOCK MECHANISM FOR LIQUID DISPENSING APPARATUS Application July 11,1950, Serial No. 1"3,202

18 Claims. 1

The present invention relates generally to liquid dispensing apparatusand more particularly to an improved resetting means for a register oithe type utilized. in liquid dispensing apparatus and. including aninterlock with the control means associated therewith.

It is an aim of the present invention to provide an automatic resettingmechanism for the register of a liquid dispensing apparatus, i. e. onewhich may be power-operated and whose operation may be initiated in asimple manner by the operator. at is a further aim of the invention toprovide an automatic resetting mechanism of the character describedwhich may be interconnected with the pump motor control and the hosenozzle support of the dispensing apparatus so as to provide automaticinitiation of the operation of the pumping means if it is desired tocommence a dispensing operation at the completion of resetting, and alsoso as to interlock these devices to prevent dispensing during resetting,and vice versa, and to prevent a subsequent dispensing operationfollowing a previous dispensing operation unless the register is firstreset to zero.

It also is an aim of the invention to provide an apparatus foraccomplishing the abovedes-cribed purposes, which apparatus is of simpleand effective design so that it may be easily fabricated and assembledwith a minimum of difficulty and expense and which will be sufiicientlyrugged and foolproof in operation so as to accomplish the desired aimsin an efiicient manner over long periods of use.

Other objects will be in part obvious, and in part pointed out more indetail hereinafter.

The invention accordingly consists in the features of construction,combination of elements and arrangement of parts which will be exempliedin the construction hereafter set forth and the scope of the applicationof which will be indicated in the appended claims.

In the drawings:

Fig. 1 is a fragmentary front view of a liquid dispensing apparatus inwhich the mechanism of the present invention has been incorporated, thehousing of the dispensing apparatus being in section so as to reveal theinterior thereof;

Fig. 2 is an enlarged side view of the device of the present inventionmounted in operative relationship on the frame of the register;

Fig. 3 is a plan View corresponding to Fig. 2;

Fig. 4 is a fragmentary side view of the apparatus of the presentinvention further en- .larged and with the side plate removed, the parts2 being shown in the position occurring at the completion of adispensing operation and before resetting;

Fig. 5 is a fragmentary view similar to Fig. l with the parts in theposition occurring just prior to the completion of a resettingoperation; and

Fig. 6 is a view similar to Fig. 5 with the parts in position occurringduring a dispensing operation.

nrst to Fig. l of the drawings, there is s own somewhat diagrammaticallya conventional liquid dispensing apparatus of the type widely used fordispensing gasoline. The apparatus is mounted in a suitable housing It!and includes a pump it, driven by an electric motor 12, the pump llbeing connected at one end to a reservoir of liquid to be dispensed (notshown), and at the other end to a meter l3. The liquid pumped throughthe meter i3 is de livered to a flexible hose it, having at its outerend a conventional dispensing nozzle and valve 15. The meter i3 isconnected by shaft l6 to a speed change mechanism or variator I! which,in turn, is connected to a register 20.

In the embodiment of the register shown in Fig. 1, the register hasthree sets of number wheels denoted at 25, 22, and 23 which can beviewed through windows 24, 25 and 26, respectively. A duplicate set ofwheels and corresponding windows (not shown) are provided at theopposite end of the register. The number wheels 2| register the cost ofthe liquid dispensed; the number wheels 22 register the quantity ofliquid dispensed; while the number Wheels 23 indicate the price pergallon at which the va riator and register are set to operate.

The register 28 of itself does not form a part of the present inventionand the register may be any one of the types widely used in liquiddispensing apparatus such as that shown, for example, in the patent toSlye No. 2,264,557, granted December 2, 1941. Additional details of theconstruction of the register 20, if desired, may be obtained byreference to said Slye patent. Those portions of the register requiredin order to describe the present invention are shown, however, in Figs.2 and 3 of the drawings.

Referring to Figs. 2 and 3, it will be seen that the sets of numberwheels 2! and 22 are mounted at the ends of the register frame 21 onreset shafts 38, which remain stationary during a registering operationbut which are adapted to be rotated in order to return the number wheelsto zero position as viewed through the windows 24 and 25. The resetshafts 3B are connected for simultaneous rotation by a main reset shaft3!. It will be noted that the ends of the reset shafts 33 have fixedthereto driven gears 32 in mesh with idler gears 33. A driving gearattached to the end of the main reset shaft 35 meshes with the idlergears 33 at the top of the register and also drives the idler gears 33at the bottom of the register through intermediate gears 35 and 36.

The number of wheels 2! and 22 are mounted on the reset shafts 39 sothat they may be freely rotated in a registering direction relative tothe shafts, but when the shafts are turned in a registering direction,means is provided for causing the shafts to pick up the number wheelsand return them to zero. The means whereby the reset shafts pick up thenumber wheels and return them to zero has been omitted from the drawingsand the present description in the interests of brevity since such meansare well known in the art and are described, for example, in the SlyePatent No. 2,264,557, previously referred to.

The driving means for driving the number wheels 2! during a dispensingoperation is best shown in Fig. 3 of the drawings. As there shown, thenumber wheels are provided with driven gears 49 fixed to the side ofeach wheel, respectively. The driven gears til of the number wheels oflowest order are driven through idler gears di by driving gears 62 fixedto a transverse shaft 43 centrally of the register. The shaft s2 isconnected through a clutch i l and bevel gear 55 with a bevel gear dsecured to the cost drive shaft d? coming from the variator. A similararrangement is provided for driving the number wheels 22 of lowest orderfrom the volume drive shaft of the variator (not shown). The numberwheels of higher order in each case are advance in a stepwise fashion bythe usual transfer means which, as illustrated in the drawings, mayco1nprise mutilated pinions d8 disposed on auxiliary shafts 49 so thateach meshes with the driven gears 43 of the adjacent number wheel ofhigher L order and also with a two-toothed driving gear 50 secured tothe adjacent number wheel of lower order.

When the number wheels 2! and 22 are advanced to zero position byrotation of the reset shafts, as previously described, the gear trainsoperating on the driven gears of the number wheels of lowest order willalso be driven in a registering direction, this being permitted by theclutches id previously described. In order to prevent any movement frombeing transmitted to the variator, each of the clutches as is providedwith an associated brake 5! which can be operated to lock the variatordrive shafts against rotation. The brakes 5| are urged to a releasedposition by springs 52 and may be actuated by connecting arm 53 fixed toa transversely positioned brake operating shaft 54.

The portions of the register thus far described. are all shown in theSM; Patent No. 2,264,557, previously referred to, and this descriptionis repeated here merely by way of background and to assist in the fullunderstanding of the functioning of the apparatus of the mechanism ofthe present invention hereinafter described.

Referring to Fig. 1 of the drawings, it will be seen that the apparatusof the present invention is mounted for the most part on a base plate 63attached to the register frame and an upright side plate 65 extendingupwardly therefrom and connected to the frame of the register by a postE32. Journaled at the top of the side plate 6! is a stub shaft 63 whichis connected to the brake operating shaft 54, previously referred to.The outer end of the stub shaft 63 is provided with a coupling 54 bymeans of which the shaft G3 may be connected through an extension to acoupling 66 provided on the interior of a shaft ti extending through thehousing 10 and provided at its outer end with an operating handle 68. Aswill be thus apparent, the operator can readily engage the brakes 5! ofthe register by turning the operating handle 68.

In accordance with the invention, the operation of the handle $8 forapplying the brakes 5! simultaneously initiates the operation of theresetting mechanism. As best shown in Fig. 4 of the drawings, there ispinned to the shaft 53 a yoke is, in the bifurcated end of which thereis received a roller 'i! which is mounted on an elongated plate 92pivoted to the frame at '33. Turning of the shaft 53 and hence the yokeit in a clockwise direction as viewed in the drawings will cause theelongated plate 72 to pivot in a counter-clockwise direction. Attachedto the outer end of the elongated plate 12 and to the frame of theregister is a spring it which urges the elongated plate in a clockwisedirection.

Mounted on opposite sides of the elongated plate i2 are a pair ofrollers denoted at E6 and l? which cooperate with notched discs 78 and'59, respectively. The notched disc '88 is fixed to the main reset shaft3! while the notched disc 79 is freely rotatable on a stud 89 secured tothe register frame.

The notched disc 73 is rotated at a l to 2 speed ratio with respect tonotched disc 78 by reason of a pinion 8| fixed to the reset shaft 3! anda gear 82 fixed to the notched disc 19. When the device is in its atrest position, i. e. at all times except during a resetting operation,the notches i8 and 79 of the discs '13 and T9 are positioned so as toreceive the rollers 16 and 1?, as best shown in Fig. 4 of the drawings.The engagement of the rollers 76 and T! at the notches l3 and is ofdiscs 18 and 79, respectively, will of course halt a resetting operationby preventing turning of themain reset shaft 3! until the rollers it andii are again disengaged.

As previously mentioned, the turning of handle 68 through the yokecauses pivoting movement of the elongated plate '12 sufiicient todisengage the rollers 16 and T! from the notches l8 and is, which thusconditions the apparatus for a resetting operation. At the same time theturning of the handle 68 causes the closing of a switch 85 forenergizing a reset motor 86. As shown in Fig. 2 of the drawings,the'shaft G3 which is turned by the handle 68 is provided with an arm 87provided with a set screw 88 for engaging the switch 85. The set screw88 may be adjusted so that the reset motor switch 85 is closed in propertiming relationship, i. e. when the rollers it and have beensufficiently disengaged from the notched disc 78 and i9 to free theapparatus for a resetting operation. The switch 85 is biased into openposition so that when it is not engaged by arm 8?, the reset motor isturned ofi.

The reset motor 86 is mounted on the plate 6i: and is adapted to turnthe main reset shaft 3!. Fixed to the end of the reset motor shaft tilis a pinion 9! which meshes with a gear 92 to which is fixed a pinion93, the gear 92 and pinion 93 being rotatably supported on a stud 94.The pinion 93 meshes with the toothed periphery of a driving plate 95 ofa clutch 96 which is supported on a stud IIII fixed to the plate 6|. Asbest shown in Fig. 3, the clutch 99 comprises a hub 91 rotatablysupported on stud If and coupled to the reset shaft, a pair of frictiondiscs 93 on opposite sides of the driving plate 95, and a resilientspider 99 which urges the assembly into frictional engagement, thespider 99 being adjustable by nuts I99. By the driving means justdisclosed, the reset motor 88 will drive the main reset shaft 3i at areduced rate of speed and the clutch 93 normally provides sufficientfriction to cause driving of the reset shaft and thus the resettingmechanism. However, when turning of the resetting mechanism isprevented, a at the end of a resetting operation, the clutch 99 willharmlessly absorb the driving force of the reset motor 89.

It thus will be seen that, when the operator turns the handle 98, hewill first cause pivoting movement of the plate I2, thus disengaging therollers 16 and H from the notched discs I8 and 79, respectively, andthen turn on the reset motor 86 by closing the switch 85. Thereupon thereset motor 99 will turn the reset shaft 3| through two completerevolutions (causing one revolution of the notched disc 79) whereuponthe rollers I6 and T! will again be received in the notches I8 and 19,respectively, thus halting the resetting operation. The resultingpivoting movement of the plate 72 also returns the shaft 61 andoperating handle 68 to initial position, thus releasing the pressure onswitch 85, thus permitting the switch 85 to open and turn off the resetmotor. Any coasting of the reset motor will be absorbed, of course, bythe clutch 96.

In addition to the notched discs I8 and 79 for halting the resettingoperation, additional stop means may be employed to ensure that thenumher wheels 2! and 22 will be accurately reset to zero during aresetting operation. As best shown in Figs. t and 5 there is provided aprojection I39 on the gear 42 which is adapted to be engaged by the noseof a stopping lever I37 which is pivotally mounted on the reset shaft3|. The opposite end of the stopping lever I3? is provided with a studI38 which is urged into engagement with the periphery of a cam I39 by aspring I49. The cam I 39 is fixed to the notched disc I9 by a lostmotion connection comprising a pin I4I extending into an enlargedaperture I42.. The cam I39 is so formed that the stopp ng lever I31 willride on the high point I43 of the cam and thus he cammed into stoppingposition for engaging the projection I39 at the end of a resettingoperation. At this point, of course, the notched disc 79 will be turnedto a rotated position such that the roller I? will enter the notch I9.When this occurs, the roller 'I'I will engage aga nst a shoulder I44 onthe cam I39, thus turning the cam in a reverse direction sufiicient topermit the stud I38 to move off the high point I43 of the cam, thusunlocking the register wheels and drive.

acco ance with the pre ent invention, the 1. ave-c. cribed resettingmechanism is intercted with the control of the main pump alsointerlocked so as to be responsive position of the hose nozzle I5. Asshown l of the drawings, the main pump motor is provided with a switchI92 which is connected by a connecting rod I93 with the end of a controllever I94 pivotally mounted on the shaft The upper end of the rod I03extends through a spring Hi5 which at its lower end abuts against abracket I06 secured to the plate 59 and at its upper end abuts against acollar I9! fixed t0 the rod. As a result, the rod I93 and the controllever I94 are urged in a direction for closing the main motor switch I3.

Pivoting movement of the control lever I94 in a direction for permittingthe main motor switch I92 to be closed may be prevented by severalagencies. It will be noted that the lever I04 is provided with aprojection III] which, as best shown in Fig. 5 of the drawings, willengage against the roller 7? when a resetting operation is in progress,i. c. with the roller '2? riding on the periphery of the notched disc19. It is thus ensured that the main pump motor I2 cannot be turned onduring a resetting operation. At the completion of a resettingoperation, when the roller TI is received in the notch 19', the leverI94 is free to turn to the position shown in Fig, 6 of the drawingswhich is the position in which the main pump motor is turned on. As bestshown in Fig. 6, the projection IIG on the lever I04 now extends abovethe roller I? and thus effectively prevents the roller from being movedout of the notch i9. Accordingly, it is impossible to initiate aresetting operation while the main pump motor is in operation. Insummary, therefore, the apparatus of the present invention isconstructed and arranged so that it is impossible to initiate adispensing operation while a resetting operation is in progress and,conversely, it is impossible to initiate a resetting operation while adispensing operation is in progress.

Pivoting movement of the lever Ifi 'i, such as to permit the main pumpmotor switch to be closed, may also be prevented by a holding pawl H2which is pivoted on the register frame 2'. and which is biased by aspring I I3 into engagement with a shoulder H4 on the control lever 49%.In accordance with the invention, the holding pawl I I2 is adapted to bedisengaged from the shoulder H4 as an incident to a resetting operation.The mechanism employed is an unlocking pawl i I5 pivotally mounted onthe plate 52 and biased by a spring H6 for engagement with a notch I ITin the tail of the holding pawl I i2. As a result of the arrangementshown, pivoting of the elongated plate "I2 to initiate a resettingoperation will cause the unlocking pawl IIE to engage the holding pawlH2 as best shown in Fig. 5 of the drawings. Then at the end of aresetting operation, when the rollers 56 and '1'? enter the notches i8and I9, thus permitting clockwise pivoting of the elongated plate I2under the influence of spring M, the unlocking pawl H5 bears on the tailof the holding pawl i i2 and disengages the holding pawl I it from thecontrol lever i94 thus freeing the latter for pivoting movement such asto permit closing of the main pump motor switch. This condition is bestshown in Fig. 6 of the drawings. The arrange ment of the notch II! andthe nose of the unlocking pawl I I5 is such that they will be cammed outof engagement at the completion of the clockwise pivoting of theelongated plate I2, whereupon the holding pawl III! will merely ride onthe periphery of the control lever It until the lever is again returnedto switch open position.

A further restriction upon pivoting movement 5 the control lever led mayalso be imposed y a slide I'iil which is mounted for horizontal sii ingmovement on the register frame by means of pins MI and elongated. slotsI22. The slide I28 is urged in a left-hand direction as viewed in thedrawings by means of a spring I23. It also is connected for operation bya thrust plate 25 pivotally mounted at the nozzle support I255.Thearrangement'of the thrust plate 125 and nozzle support IZfi is's'uchthat, in order to place the nozzle lion the support, it is necessary tomove the thrust plate I25 inwardly as shown in Fig. l of the drawings.The thrust plate I25 is connected by a rod I21 to one end of a bellcrank i28 which, in turn, is connected at the other end by a rod I29 tothe slide I29. By means of these connections, placing the nozzle on thenozzle support will result in the slide 129 being moved to the fullestextent possible in a right-hand direction as viewed in the drawings.Conversely, when the nozzle is removed from its support, the spring I 23will return the slide I21? to the initial position.

As shown in the drawings, the lower edge of the slide I20 is providedwith a notch I 35 in which is received a finger I3I made integral withthe control lever I04. As a result, when the hose nozzle is on itssupport, thus moving the slide I 20 to its right-hand position (thisposition being shown in Fig. i of the drawings) the finger 3| willengage against the end of the notch lit, thus effectively preventing thecontrol lever ltd from pivoting such as to turn on the main motorswitch. However, if the hose nozzle is oil the support, which permitsthe slide I20 to move to the left-hand position shown in Figs. 5 and 6,the notch I34! will be so positioned that it will not interfere withfinger HI and thus control lever IM. The primary purpose of notch I39and finger I 3|, however, is to permit the main motor switch to beopened when the nozzle is placed on its support, thereby finallyterminating a dispensing operation. As will be apparent, the resultingmovement of the slide I20 to the righthand position shown in Fig. 4 bybearing against the nger I 31 will turn the control lever I8 3 againstthe influence of spring i 35, thus opening the main motor switch I62.

In order to further ensure that the control lever I03 cannot be turnedto the on position when the nozzle is on its support, there is provi'dedat the left-hand end of the slide I26 a shoulder I36 against which theupper end of the unlocking pawl I15 is adapted to engage, in the event aresetting operation is initiated when the hose nozzle is on itssupport, 1. e. when the slide I28 is in the right-hand position shown inFig. 4 of the drawings. The abutment of the unlocking pawl [I5 againstthe shoulder I34 prevents it from pivoting under the influence of springI I5 I into engagement with the notch I I? or" the holding pawl I I2.Accordingly, at the end of the resetting operation and if the hosenozzle is still on its support, the unlocking pawl H5 cannot engage theholding pawl I I2 and thus disengage the holding pawl H2 from theshoulder I Id of the control lever I94.

As a result of the mode of operation of the mechanism as abovedescribed, it will be apparent that the operator cannot turn on the mainpump motor unless he resets the register by turning the handle 68 andalso removes the nozzle from its support. The operator may reset theregister at any time without removing the nozzle from its support butthis will not cause the main pump motor to turn on. Accordingly, theoperator, if he prefers, may reset the register to zero immediatelyafter a preceding dispensing operation and without waiting until suchtime as a second dispensing operation is carried out. Al

though the operator may have reset the register to zero previously, hemust repeat the resetting operation in order to turn on the pump motorbecause the holding pawl 'I I2 can be disengaged only in this manner. Itthus is ensured that there can be no subsequent dispensing operationwithout first resetting the register to zero.

As many changes could be made in the above construction and manyapparently widely different embodiments of this invention could be madewithout departing from the scope thereof, it is intended that all mattercontained in the above description or shown in the accompanying drawingsshall be interpreted as illustrative and not in a limiting sense.

It is also to be understood that the language used in the followingclaims is intended to cover all of the generic and specific features ofthe in vention herein described and all statements of the scope of theinvention which, as a matter of language, might be said to falltherebetween.

We claim as our invention:

7 1. In a liquid dispensing apparatus, a register provided with resetmeans including a rotatable reset shaft, a reset motor, means providinga driving connection between the reset motor and the reset shaft, aswitch for controlling the operation of the reset motor, pivotallymounted means engageable with the reset means when the reset shaft isinzero position for locking the reset shaft in such position, meansbiasing the locking means into locking position, means movable with thelocking means for closing the reset motor switch when the locking meansis in unlocking position and for opening the reset motor switch when thelocking means is in locking position, manually operable means for movingthe locking means to unlocking position to initiate a resettingoperation, and clutch means in said driving connection means forpermitting overrunning of the reset motor at the completion of aresetting operation.

2. In a liquid dispensing apparatus, a register provided with resetmeans including a rotatable reset shaft, a reset motor, means providingdriving connection between the reset motor and the reset shaft, a switchfor controlling the operation of the reset motor, a member having anotch rotated by the reset shaft, 2-. pivoted locking member biased intoengagement with said notch, said members being constructed and arrangedso that engagement of the locking member with the notch occurs at fullreset position of the reset shaft, manually operable for moving thelocking member to unlocking position, means movable with the lockingmemher for opening the reset motor switch when the locking member is inengagement with the notch and for closing the reset motor switch whenthe locking member is moved to unlocking position, and clutch in saiddriving connection means for permitting overrunning of the reset motorat the completion of a resetting operation.

3, in a liquid dispensing apparatus, a register provided with arotata'ble reset shaft, a reset motor, means providing a drivingconnection between the reset motor and the reset shaft, a switch forcontrolling the operation of the reset motor, a rotatable notched disc,means operated by the reset shaft for driving the disc at a rate ofspeed such that the rate of speed of the reset shaft is a multiple orthe rate of speed of the disc, a pivotal control member biased towardthe disc having a follower for engaging in the notch at the completionof a resetting operation to lock the reset shaft against rotation andfor riding on the periphery of the disc during a resetting operation,manually operated means for pivoting the control member to disengage thefollower from the notch, and means movable with the control member forclosing the reset motor switch when the follower is disengaged from thenotch and for opening the switch when t .e follower is engaged in thenotch.

l. In a liquid dispensing apparatus, a register provided with resetmeans including a rotatable reset shaft, driving means for the registerpro vided with a brake, a reset motor connected to the reset shaft, aswitch for controlling the operation of the reset motor, a movablemember engageable with the reset means when the reset shaft is in zeroposition for locking the reset shaft in said position, means biasing themovable member into locking position, means movable with the movablemember for closing the reset motor switch when the movable member inunlocking position and for opening the reset motor switch when themovable member is in looking position, and manually operable means forapplying the brake and for moving the movable member to unlockingposition to initiate a resetting operation.

5. In a liquid dispensing apparatus of the type having a registerprovided with a rotatable reset shaft, a liquid pump, power means foractuating the pump, and a switch for controlling the operation of thepower means, the combination therewith of a reset motor, means providinga driving connection between the reset motor the reset shaft, a switchfor controlling the operation of the reset motor, a movable memberoperative when the reset shaft is in an initial rotated position forlocking the reset shaft in such rotated position, means biasing themovable member into locking position, manually operable means for movingthe movable member into unlocking position, means operated by themovable member for closing the reset motor switch when the movablemember is in unlocking position and for opening the reset motor switchwhen the movable member is in looking position, a power control leverconnected to the said power means switch for opening and closing theswitch, and means for mounting the power control lever in position suchthat movement of the said movable member to unlocking position isprevented by the power control lever when latter is in switch closedposition, and movement of the power control lever to switch closedposition is prevented by the said movable memher when the latter is inunlocking position.

6. In a liquid dispensing apparatus of the type having a registerprovided with a rotatable reset shaft, a pump, an electric motor foractuating the pump, and a switch for controlling the operation of themotor, the combination therewith of a reset motor, means providing adriving connec tion between the reset motor and the reset shaft, aswitch for controlling the operation of the reset motor, a movablemember operative when the reset shaft is in an initial rotated positionfor locking the reset shaft in such rotated position, means biasing themovable member into locking position, means operated by the movablemember for closing the reset motor switch when the movable member is inunlocking position and for opening the reset motor switch when themovable member is in looking position, manually operable means formoving the movable member into unlocking position to initiate aresetting operation, a power control lever connected to the said pumpmotor switch, means for mounting the power control lever in positionsuch that movement of the lever to switch closed position is preventedby the said movable member when the latter is in unlocking position,means for latching the power control lever in switch open position, andmeans operated by the movable member for unlatching said latching meanswhen the movable member is moved from unlocking osition into lockingposition.

'7. In a liquid dispensing apparatus of the type having a registerprovided with a reset shaft, a dispensing hose provided with a nozzle, asupport for the nozzle, a pump, a pump motor, and a switch forcontrolling the operation of the pump motor, the combination therewithof a reset motor, means providing a driving connection between the resetmotor and the reset shaft, a switch for controlling the operation of thereset motor, a movable member operative when the reset shaft is in aninitial rotated position for looking the reset shaft in such rotatedposition, means biasing the movable member into locking position, meansoperated by the mova le member for closing the reset motor switch whenthe movable member is in unlocking position and for opening the resetmotor switch when the movable member is in looking position, manuallyoperative means for moving the movable member into un locking positionto initiate a resetting operation, a power control lever connected tothe said pump motor switch, means biasing the power control lever intoswitch closed position, means for preventing movement of the controllever into switch closed position when the movable member is inunlocking position, means for latching the power control lever in switchopen position, means for unlatching the latching means when the movablemember is moved from unlocking position into locking position, and meansoperable when the hose nozzle is on its support for rendering saidlast-named means inoperable.

8. In a liquid dispensing apparatus, of the type having a registerprovided with a reset shaft, a dispensing hose provided with a nozzle, asupport for the nozzle, a pump, a pump motor, a switch for controllingthe operation of the pump motor, means for driving the register inresponse to operation of the pump, and a brake for the driving means,the combination therewith of a reset motor, means providing a drivingconnection between the reset motor and the reset shaft, a switch forcontrolling the operation of the reset motor, a movable member operativewhen the reset shaft is in an initial rotated position for locking thereset shaft in such rotated position, means biasing the movable memberinto locking position, means operated by the movable member for closingthe reset motor switch when the movable member is in unlocking positionand for opening the reset motor switch when the movable member is inlooking position, manually operative means for applying the brake andfor moving the movable member into unlocking position to initiate aresetting operation, a power control lever connected to the said pumpmotor switch, means biasing the power control lever into switch closedposition, means for preventing movement of the control lever into switchclosed position when the movable member is in unlocking position, meansfor latching the power control lever in switch open position, means forunlatching the latching means when the movable member is moved fromunlocking position into locking position, and means actuatable byplacaeeaoee ii ing the hose nozzle on its support for holding the powercontrol lever in switch open position.

9. In a liquid dispensing apparatus of the type having a registerprovided with a rotatable reset shaft, a dispensing hose provided with anozzle, a support for the nozzle, a pump, a pump motor, and a switch forcontrolling the operation of the pump motor, the combination therewithof a reset motor, means providing a driving connection between the resetmotor and the reset shaft,

a switch for controlling the operation of the reset motor, a pivotallymounted locking member operative when the reset shaft is in an initialrotated position for locking the reset shaft in such position, meansbiasing the locking member into locking position, means operated by thelocking member for closing the reset motor switch when the lockingmember is in unlocking position and for opening the reset motor switchwhen the looking member is in looking position, manually operable meansfor moving the locking member into unlocking position to initiate aresetting operation, a power control lever connected to the pump motorswitch, means for pivotally mounting the power control lever in positionsuch that movement of the power control lever to switch closed positionis prevented by the locking member when the latter is in unlockingposition, a slide biased into a first position, means for moving theslide to a second position when the hose nozzle is placed on itssupport, and means on the slide for moving the power control lever toswitch open position when the slide is moved to said second position.

10. In a liquid dispensing apparatus of the type having a registerprovided with a rotatable reset shaft, a dispensing hose provided with anozzle, a support for the nozzle, a pump, a pump motor, and a switch forcontrolling the operation of the pump motor, the combination therewithof a reset motor, means providing a driving connection between the resetmotor and the reset shaft, a switch for controlling the operation of thereset motor, a pivotally mounted locking member operative when the resetshaft is in an initial rotated position for locking the reset shaft insuch position, means biasing the locking member into locking position,means operated by the locking member for closing the reset motor switchwhen the locking member is in unlocking position and for opening thereset motor switch when the locking member is in looking position,manually operable means for moving the locking member into unlockingposition to initiate a resetting operation, a power control leverconnected to the pump motor switch, means for pivotally mounting thepower control lever in position such that movement of the power controllever to switch closed position is prevented by the locking member whenthe latter is in unlocking position, a slide biased into a firstposition, means for moving the slide to a second position when the hosenozzle is placed on its support, latching means for latching the powercontrol lever in switch open position, means operated by the lockingmember when the latter is moved from unlocking position to lockingposition for unlatching the latching means, and means on the slide forpreventing the operation of said unlatching means when the slide is insaid second position.

11. In a liquid dispensing apparatus of the type having a registerprovided with a rotatable reset shaft, a dispensing hose provided with anozzle, a support for the nozzle, a pump, a pump motor, and a switch forcontrolling the operation of the pump motor, the combination therewithof a reset motor, means providing a driving connection between the resetmotor and the reset shaft, a switch for controlling the operation of thereset motor, a pivotally mounted locking member operative when the resetshaft is in an initial rotated position for locking the reset shaft insuch position, means biasing the locking member into locking position,means operated by the looking member for closing the reset motor switchwhen the locking member is in unlocking position and for opening thereset motor switch when the locking member is in looking position,manually operable means for moving the locking member into unlockingposition to initiate a resetting operation, a power control leverconnected to the pump motor switch, means for pivotally mounting thepower control lever in position such that movement of the power controllever to switch closed position is prevented, by the locking member whenthe latter is in unlocking position, and movement of the locking memberto unlocking position is prevented by the power control lever when thelatter is switch closed position, a slide biased into a first position,means for moving the slide to a second position when the hose nozzle isplaced on its support, means on the slide for moving the power controllever to switch open position when the slide is moved to said secondposition, latching means for latching the power control lever in switchopen position, means operated by the locking member when the latter ismoved from unlocking position to looking position for unlatehing thelatching means, and means on the slide for preventing the operation ofsaid unlatching means when the slide is in said second position.

12. In a liquid dispensing apparatus of the type having a registerprovided with a rotatable reset shaft, a pump, a pump motor, and aswitch for controlling the operation of the pump motor, the combinationtherewith of a reset motor, means providing a driving connection betweenthe reset motor and the reset shaft, a switch for controlling theoperation of the reset motor, a movably mounted plate, rotatable meansdriven by the reset shaft for maintaining the plate in a first pivotedposition except when the reset shaft is in an initial rotated position,means biasing the plate into a second position, means con-. nected tothe plate for closing the reset motor switch when the locking member isin said first position and for opening the reset motor switch when theplate is in said second position, manually operable means for moving theplate into said second position to initiate a resetting operation, apower control lever connected to the pump motor switch, means forpivotally mounting the power control lever in position such'thatmovement of the power control lever to switch closed position isprevented by the plate when the latter is in said first position, andmovement of the plate to said first position is prevented by the powercontrol lever when the latter is in switch closed position.

13. In a liquid dispensing apparatus of the type having a registerprovided with a rotatable reset shaft, a pump, a pump motor, a switchfor controlling the operation of the pump motor, means for driving theregister rcSPOnsive to operation of the pump, and a brake for theregister driving means, the combination therewith of a reset motor,means providing a driving connection between the reset'motor andthe-reset shaft, a switch for controlling theoperation of the re-,

set motor, a movably mounted plate, rotatable means driven by the resetshaft for retaining the plate in a first position except when the resetshaft is in an initial rotated position, means urging the plate into asecond position, means for locking the reset shaft against rotation whenthe plate is in said second position, means connected to the plate forclosing the reset motor switch when the plate is in said first positionand for opening the reset motor switch when the plate is in said secondposition, manually operable means for applying the brake and for movingthe plate to said first position to initiate a resetting operation, apower control lever connected to the pump motor switch, means formounting the power control lever for movement in a path such thatmovement of the power control lever to switch closed position isprevented by the plate when the latter is in said first position andmovement of the plate to said first position is prevented by the powercontrol lever when the latter is in switch closed position, meansbiasing the power control lever into switch closed position, andmanually controllable means for holding the power control lever inswitch open position.

14.1n a liquid dispensing apparatus of the type having a registerprovided with a rotatable reset shaft, a pump, a pump motor and a switchfor controlling the operation of the pump motor, the combinationtherewith of a reset motor, means providing a driving connection betweenthe reset motor and the reset shaft, a switch for controlling theoperation of the reset motor, a movably mounted plate, rotatable meansdriven by the reset shaft for retaining the plate in a first positionexcept when the reset shaft is in an initial rotated position, meansurging the plate into a second position, means for locking the resetshaft against rotation when the plate is in said second position, meansconnected to the plate for closing the reset motor switch when the plateis in said first position and for opening the reset motor switch whenthe plate is in said second position, manually operable means for movingthe plate to said first position to initiate a resetting operation, apower control lever connected to the pump motor switch, means formounting the power control lever for movement in a path such thatmovement of the power control lever to switch closed position isprevented by the plate when the latter is in said first position andmovement of the plate to said first position is prevented by the powercontrol lever when the latter is in switch closed position, meansbiasing the power control lever into switch closed position, latchingmeans for latching the power control lever in switch open position,means operated by the plate for unlatching the latching means when theplate is moved from said first position to said second position, andmanually controllable means for preventing the operation of saidunlatching means.

15. In a liquid dispensing apparatus of the type having a registerprovided with a rotatable reset shaft, a pump, a pump motor and a switchfor controlling the operation of the pump motor, the combinationtherewith of a reset motor, means providing a driving connection betweenthe reset motor and the reset shaft, a switch for controlling theoperation of the reset motor, a rotatably mounted disc having a notch inthe periphery thereof, means forming a driving connection between thereset shaft and a disc, a movably mounted plate, a roller on the plateadapted to engage the periphery of the notched disc and to be receivedin the notch thereof, means urging the plate into such engagingposition, means for locking the reset shaft against rotation when theplate is positioned with the roller thereof in the notch of the notcheddisc, means connected to the plate for closing the reset motor switchwhen the plate is positioned with its roller in the notch of saidnotched disc and for opening the reset motor switch when the plate ispositioned with its roller on the periphery of said disc, manuallyoperable means for moving the plate to disengage the roller from saidnotch to initiate a resetting operation, a power control lever connectedto the pump motor switch, means for mounting the power control lever formovement in a path such that movement of the power control lever toswitch closed position is prevented by the plate when the latter is inposition with its roller engaging on the periphery of the notched discand movement of the plate to disengage the roller thereof from the notchof the notched disc is prevented by the power control lever when thelatter is in switch closed position, means biasing the power controllever into switch closed position, and manually controllable means forholding the power control lever in switch open position.

16. In a liquid dispensing apparatus of the type having a registerprovided with a rotatable reset shaft, a pump, a pump motor and a switchfor controlling the operation of the pump motor, the combinationtherewith of a reset motor, means providing a driving connection betweenthe reset motor and the reset shaft, a switch for controlling theoperation of the reset motona rotatably mounted disc having a notch inthe periphery thereof, means forming a driving connection between thereset shaft and the disc, a movably mounted plate, a roller on the plateadapted to engage the periphery of the notched disc and to be receivedin the notch thereof, means urging the plate into such engagingposition, means for looking the reset shaft against rotation when theplate is positioned with the roller thereof in the notch of the notcheddisc, means connected to the plate for closing the reset motor switchwhen the plate is positioned with its roller in the notch of saidnotched disc and for opening the reset motor switch when the plate ispositioned with its roller on the periphery of said disc, manuallyoperable means for moving the plate to disengage the roller from saidnotch to initiate a resetting operation, a power control lever connectedto the pump motor switch, means for mounting the power control lever formovement in a path such that movement of the power control lever toswitch closed position is prevented by the plate when the latter is inposition with its roller engaging on the periphery of the notched discand movement of the plate to disengage the roller thereof from the notchof the notched disc is prevented by the power control lever when thelatter is in switch closed position, means biasing the power controllever into switch closed position, latching means for latching the powercontrol lever in switch open position, means for unlatching the latchingmeans operated by the plate when the plate is moved to engage the rollerthereof in the notch of the notched disc, and manually controllablemeans for preventing the operation of said unlatching means.

1'7. In a liquid dispensing apparatus of the type having a registerprovided with a rotatable reset shaft, a dispensing hose provided with a15 nozzle, a support for the nozzle, a pump, a pump motor and a switchfor controlling the operation of the pump motor, the combinationtherewith of a reset motor, means providing a driving connection betweenthe reset motor and the reset shaft, a switch for controlling theoperation of the reset motor, a rotatably mounted disc having a notch inthe periphery thereof, means forming a driving connection between thereset shaft and the disc, a movably mounted plate, a roller on the plateadapted to engage the periphery of the notched disc and to be receivedin the notch thereof, means urging the plate into such engagingposition, means for locking the reset shaft against rotation when theplate is positioned with the roller thereof in the notch of the notcheddisc, means connected to the plate for opening the reset motor switchwhen the plate is posi tioned with its roller in the notch of saidnotched disc and for closing the reset motor switch when the plate ispositioned with its roller on the periphery of said disc, manuallyoperable means for moving the plate to disengage the roller from saidnotch to initiate a resetting operation, a power control lever connectedto the pump motor switch, means for mounting the power control lever formovement in a path such that movement of the power control lever toswitch closed position is prevented by the plate when the latter is inposition with its roller engaging on the periphery of the notched discand movement of the plate to disengage the roller thereoi from the notchof the notched disc is prevented by the power control lever when thelatter is switch closed position, means biasing the power control leverinto switch closed position, latching means for latching the powercontrol lever in switch open position, means for unlatching the latchingmeans operated by the plate when the plate is moved to engage the rollerthereof in the notch of the notched disc, and means operated by placingthe hose nozzle on its support for moving the power control lever toswitch open position and for preventing the operation of said unlatchingmeans.

18. In a liquid dispensing apparatus of the type having a registerprovided with a rotatable reset shaft, a dispensing hose provided with anozzle, a support for the nozzle, a pump, a pump motor and a switch forcontrolling the operation of the pump motor, the combination therewithof a reset motor, means providing a driving connection between the resetmotor and the reset shaft, a switch for controlling the operation of 16forming a driving connection between the reset shaft and the disc, atmovably mounted plate, a roller on the plate adapted to engage theperiphery of the notched disc and to be received in the notch thereof,means urging the plate into such engaging position, means for lockingthe reset shaft against rotation when the plate is positioned with theroller thereof in the notch of the notched disc, means connected to theplate for opening the reset motor switch when the plate is positionedwith its roller in the notch of said notched disc and for closing thereset motor switch when the plate is positioned with its roller on theperiphery of said disc, manually operable means for moving the plate todisengage the roller from said notch to initiate a resetting operation,a power control lever connected to the pump motor switch, means formounting the power control lever for movement in a path such thatmovement of the power control lever to switch closed position isprevented by the plate when the latter is in position with its rollerengaging on the periphery of the notched disc and movement of the plateto disengage the roller thereof from the notch of the notched disc isprevented by the power control lever when the latter is in switch closedposition, means biasing the power control lever into switch closedposition, latching means for latching the power control lever in switchopen position, means for unlatching the latching means operated by theplate when the plate is moved to engage the roller thereof in the notchof the notched disc, a slide biased into a first position, means formoving the slide to a second position when the hose nozzle is placed onits support, means on the slide for moving the power control lever toswitch open position and for preventing the operation of said unlatchingmeans when the slide is moved to said second position, means operated byplacing the hose nozzle on its support for moving the power controllever to switch closed position and for preventing the operation of saidunlatching means. I V

HARVEY N. BLISS. OTTO WILD, JR.

anrssanops CITED The following references are of record'i'n the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,866,523 Alexander July 12, 19322,109,352 Hazard Feb. 22, 1938 r 2,336,381 Woodford et al. 'Dec. 7, 1943

